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thirty (30) days thereof any Part (except in the case of any Part consisting of or constituting a part or any Equipment Change which Lessee is or would be
entitled to remove pursuant to Section 8.12) that is permanently removed from the Aircraft. Any Part which is lost, stolen, destroyed, seized, obsolete, confiscated, damaged beyond repair or permanently rendered unfit for any reason, must be
replaced (except in the case of any Part consisting of or constituting a part or any Equipment Change which Lessee is or would be entitled to remove pursuant to Section 8.12) in accordance with Section 8.11(b). Lessee may remove or cause to be
removed in the ordinary course of maintenance, service, repair, overhaul, or testing, any Parts, whether or not worn out, lost, stolen, destroyed, seized, confiscated, damaged beyond repair, or permanently rendered unfit for use; provided that
(except in the case of any Part consisting of or constituting a part or any Equipment Change which Lessee is or would be entitled to remove pursuant to Section 8.12) Lessee shall replace such Parts in accordance with Section 8.11(b). Any Engine or
Part may be installed on another aircraft that Lessee owns or leases in accordance with Section 8.11(c). Lessee may temporarily install an engine or part on the Aircraft in accordance with Section 8.11(d). Lessee shall obtain from any person to whom
possession of an Engine is given, and from the lessor of any airframe on which an Engine is installed and from any holder of a Security Interest in any airframe on which an Engine is installed, an agreement in writing (which agreement, in the case